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Old 08-31-2005, 02:59 PM
pcmaher's Avatar
Big Black V12
 
Join Date: Apr 2003
Location: Chicago, IL
Posts: 430
W140 Sudden Electrical Gremlin, any ideas?

It never ends....

Driving to work this morning, start merging into left turn lane. Hit turn signal, doesn’t come on. Battery and ADS light both come on. Radio goes off. Car keeps running, no signs of hesitation or stalling. Pull into lot, leave engine running. Speedo stuck at 38 mph, and Tach stuck at 1,250. Shut engine off, heard regular clicking (relay?) from trunk. Was able to pop trunk, but by the time I got to the trunk I could not hear the clicking anymore. Went back inside the car. Tried turning ignition on again, noticed that caution lights did not all illuminate as usual. Some did, others didn’t. ADS light stays on.

Went back out after researching on Forum...didn't find too much.

Opened door, no interior lights. Speedo and Tach still stuck. Clock stopped. Hazard lights don’t work. Trunk release works. Fuel gage zero. Started car, no problem. Battery light on, Fuel gage still zero and Low Fuel level light on. Oil level light on, oil pressure gage zero. ADS and Seatbelt lights on.

Pressing Hazard switch turns off all the caution lights except ADS light, and does not turn Hazard lights on. As soon as Hazard switch is released, caution lights come back on. Turn signals still not working. Climate Control works. Radio working, but stays on without key. Door close assist works. Rear window heater does not stay on. Light in rocker switch comes on, but won’t stay toggled on. Rear shade works.

I need to check fuses, battery voltage, Combination relay, and pull codes tonight.

Anybody have any thoughts on this?
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